Help...!! How To Root My Version A3

I have an issue when im trying to root my Samsung Galaxy A3... i Cant Find Same Built Version with mibe on other Threads... so please help me ....

Its some detail of my devices...
Type A3
Sm 300H

Android
5.02 Build

Built in ver
LRX22G.A300HXXS1BPE1


Please help me how to root this..... :(